As discusses earlier, the pilot flying was likely aware the precision approach oath indicator was indicating four res light when the pilot ministering said “it’s low.” He would have that this indication required an immediate go-around. He may have continued the approach because he believed he could correct the vertical oath deviation, because he did not want to acknowledge the error and “fail” his operating experience training flight , or because he was deferring to the pilot ministering (a more senior crewmembers)